For those who are having issues with the JumperBook Air, here is the solution and cause of the problem:
First, before I go any further a quick recap of USB 3.X and USB C.
USB currently has USB 1.0, USB 2.0, USB 3.0 and USB 3.1, but recently they changed it to be USB 3.1 Gen1 instead of USB 3.0.
USB Ports can be A, B, Mini, Micro, Micro (3.0), and C. The USB C plug is just a plug, it does not mean USB 3.1 Gen2. You can wire a USB C plug to be USB 2.0 if you wanted to.
In the case of the JumperBook Air, the USB C plug is actually a USB 3.0 (or 3.1 Gen1 if you go by the “new” draft) USB 3.0 only supports a small amount of the PD (Power Distribution) protocalls that 3.1 allows. As a result, many charge/hub combos will not work. In addition the USB C charge port isn’t a standard USB C port as I have a Kingston USB C 64GB flash drive and it will not be detected when inserted. You also can’t use USB C to HDMI etc., as USB 3.0 doesn’t support these.
The only way I found to get charging and using a hub at the same time was to find a cheap USB C hub that allows for current to flow in the opposite direction, and I stress I have no idea what this will do to the hub or your JumperBook Air. I have a USB wall charger that I connect a USB A to A cable that provides 15W, I plug that into the USB Hub and my JumperBook Air will start charging and I can use USB devices on the hub. Only issue is that I am sure this isn’t the way the hubs are supposed to work, and might cause issues.
